#!/bin/sh
# Copyright (C) 2006-2013 OpenWrt.org
# Copyright (C) 2006 Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de>
# Copyright (C) 2010 Vertical Communications
debug () {
        ${DEBUG:-:} "$@"
}
# newline
N="
"
_C=0
NO_EXPORT=1
LOAD_STATE=1
LIST_SEP=" "
append() {
        local var="$1"
        local value="$2"
        local sep="${3:- }"
        eval "export ${NO_EXPORT:+-n} -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
}
list_contains() {
        local var="$1"
        local str="$2"
        local val
        eval "val=\" \${$var} \""
        [ "${val%% $str *}" != "$val" ]
}
config_load() {
        [ -n "$IPKG_INSTROOT" ] && return 0
        uci_load "$@"
}
reset_cb() {
        config_cb() { return 0; }
        option_cb() { return 0; }
        list_cb() { return 0; }
}
reset_cb
package() {
        return 0
}
config () {
        local cfgtype="$1"
        local name="$2"
        export ${NO_EXPORT:+-n} CONFIG_NUM_SECTIONS=$(($CONFIG_NUM_SECTIONS + 1))
        name="${name:-cfg$CONFIG_NUM_SECTIONS}"
        append CONFIG_SECTIONS "$name"
        [ -n "$NO_CALLBACK" ] || config_cb "$cfgtype" "$name"
        export ${NO_EXPORT:+-n} CONFIG_SECTION="$name"
        export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_TYPE=$cfgtype"
}
option () {
        local varname="$1"; shift
        local value="$*"
        export ${NO_EXPORT:+-n} "CONFIG_${CONFIG_SECTION}_${varname}=$value"
        [ -n "$NO_CALLBACK" ] || option_cb "$varname" "$*"
}
list() {
        local varname="$1"; shift
        local value="$*"
        local len
        config_get len "$CONFIG_SECTION" "${varname}_LENGTH" 0
        [ $len = 0 ] && append CONFIG_LIST_STATE "${CONFIG_SECTION}_${varname}"
        len=$(($len + 1))
        config_set "$CONFIG_SECTION" "${varname}_ITEM$len" "$value"
        config_set "$CONFIG_SECTION" "${varname}_LENGTH" "$len"
        append "CONFIG_${CONFIG_SECTION}_${varname}" "$value" "$LIST_SEP"
        list_cb "$varname" "$*"
}
config_unset() {
        config_set "$1" "$2" ""
}
# config_get <variable> <section> <option> [<default>]
# config_get <section> <option>
config_get() {
        case "$3" in
                "") eval echo "\${CONFIG_${1}_${2}:-\${4}}";;
                *)  eval export ${NO_EXPORT:+-n} -- "${1}=\${CONFIG_${2}_${3}:-\${4}}";;
        esac
}
# config_get_bool <variable> <section> <option> [<default>]
config_get_bool() {
        local _tmp
        config_get _tmp "$2" "$3" "$4"
        case "$_tmp" in
                1|on|true|yes|enabled) _tmp=1;;
                0|off|false|no|disabled) _tmp=0;;
                *) _tmp="$4";;
        esac
        export ${NO_EXPORT:+-n} "$1=$_tmp"
}
config_set() {
        local section="$1"
        local option="$2"
        local value="$3"
        local old_section="$CONFIG_SECTION"
        CONFIG_SECTION="$section"
        option "$option" "$value"
        CONFIG_SECTION="$old_section"
}
config_foreach() {
        local ___function="$1"
        [ "$#" -ge 1 ] && shift
        local ___type="$1"
        [ "$#" -ge 1 ] && shift
        local section cfgtype
        [ -z "$CONFIG_SECTIONS" ] && return 0
        for section in ${CONFIG_SECTIONS}; do
                config_get cfgtype "$section" TYPE
                [ -n "$___type" -a "x$cfgtype" != "x$___type" ] && continue
                eval "$___function \"\$section\" \"\$@\""
        done
}
config_list_foreach() {
        [ "$#" -ge 3 ] || return 0
        local section="$1"; shift
        local option="$1"; shift
        local function="$1"; shift
        local val
        local len
        local c=1
        config_get len "${section}" "${option}_LENGTH"
        [ -z "$len" ] && return 0
        while [ $c -le "$len" ]; do
                config_get val "${section}" "${option}_ITEM$c"
                eval "$function \"\$val\" \"\$@\""
                c="$(($c + 1))"
        done
}
insert_modules() {
        [ -d /etc/modules.d ] && {
                cd /etc/modules.d
                sed 's/^[^#]/insmod &/' $* | ash 2>&- || :
        }
}
default_prerm() {
        local name
        name=$(echo $(basename $1) | cut -d. -f1)
        [ -f /usr/lib/opkg/info/${name}.prerm-pkg ] && . /usr/lib/opkg/info/${name}.prerm-pkg
        for i in `cat /usr/lib/opkg/info/${name}.list | grep "^/etc/init.d/"`; do
                $i disable
                $i stop
        done
}
default_postinst() {
        local name rusers
        name=$(echo $(basename $1) | cut -d. -f1)
        [ -f ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.postinst-pkg ] && ( . ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.postinst-pkg )
        rusers=$(grep "Require-User:" ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.control)
        [ -n "$rusers" ] && {
                local user group uid gid
                for a in $(echo $rusers | sed "s/Require-User://g"); do
                        user=""
                        group=""
                        for b in $(echo $a | sed "s/:/ /g"); do
                                local name id
                                name=$(echo $b | cut -d= -f1)
                                id=$(echo $b | cut -d= -f2)
                                [ -z "$user" ] && {
                                        user=$name
                                        uid=$id
                                        continue
                                }
                                gid=$id
                                [ -n "$gid" ] && group_add $name $gid
                                [ -z "$gid" ] && {
                                        group_add_next $name
                                        gid=$?
                                }
                                [ -z "$group" ] && {
                                        user_exists $user || user_add $user "$uid" $gid
                                        group=$name
                                        continue
                                }
                                group_add_user $name $user
                        done
                done
        }
        [ "$PKG_UPGRADE" = "1" ] || for i in `cat ${IPKG_INSTROOT}/usr/lib/opkg/info/${name}.list | grep "^/etc/init.d/"`; do
                [ -n "${IPKG_INSTROOT}" ] && $(which bash) ${IPKG_INSTROOT}/etc/rc.common ${IPKG_INSTROOT}$i enable; \
                [ -n "${IPKG_INSTROOT}" ] || {
                        $i enable
                        $i start
                }
        done
        return 0
}
include() {
        local file
        for file in $(ls $1/*.sh 2>/dev/null); do
                . $file
        done
}
find_mtd_index() {
        local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
        local INDEX="${PART##mtd}"
        echo ${INDEX}
}
find_mtd_part() {
        local INDEX=$(find_mtd_index "$1")
        local PREFIX=/dev/mtdblock
        [ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
        echo "${INDEX:+$PREFIX$INDEX}"
}
group_add() {
        local name="$1"
        local gid="$2"
        local rc
        [ -f "${IPKG_INSTROOT}/etc/group" ] || return 1
        [ -n "$IPKG_INSTROOT" ] || lock /var/lock/group
        echo "${name}:x:${gid}:" >> ${IPKG_INSTROOT}/etc/group
        rc=$?
        [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/group
        return $rc
}
group_exists() {
        grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/group
}
group_add_next() {
        local gid gids
        gid=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
        [ -n "$gid" ] && return $gid
        gids=$(cat ${IPKG_INSTROOT}/etc/group | cut -d: -f3)
        gid=100
        while [ -n "$(echo $gids | grep $gid)" ] ; do
                gid=$((gid + 1))
        done
        group_add $1 $gid
        return $gid
}
group_add_user() {
        local grp delim=","
        grp=$(grep -s "^${1}:" ${IPKG_INSTROOT}/etc/group)
        [ -z "$(echo $grp | cut -d: -f4 | grep $2)" ] || return
        [ -n "$(echo $grp | grep ":$")" ] && delim=""
        [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
        sed -i "s/$grp/$grp$delim$2/g" ${IPKG_INSTROOT}/etc/group
        [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
}
user_add() {
        local name="${1}"
        local uid="${2}"
        local gid="${3}"
        local desc="${4:-$1}"
        local home="${5:-/var/run/$1}"
        local shell="${6:-/bin/false}"
        local rc
        [ -z "$uid" ] && {
                uids=$(cat ${IPKG_INSTROOT}/etc/passwd | cut -d: -f3)
                uid=100
                while [ -n "$(echo $uids | grep $uid)" ] ; do
                        uid=$((uid + 1))
                done
        }
        [ -z "$gid" ] && gid=$uid
        [ -f "${IPKG_INSTROOT}/etc/passwd" ] || return 1
        [ -n "$IPKG_INSTROOT" ] || lock /var/lock/passwd
        echo "${name}:x:${uid}:${gid}:${desc}:${home}:${shell}" >> ${IPKG_INSTROOT}/etc/passwd
        echo "${name}:x:0:0:99999:7:::" >> ${IPKG_INSTROOT}/etc/shadow
        rc=$?
        [ -n "$IPKG_INSTROOT" ] || lock -u /var/lock/passwd
        return $rc
}
user_exists() {
        grep -qs "^${1}:" ${IPKG_INSTROOT}/etc/passwd
}
[ -z "$IPKG_INSTROOT" -a -f /lib/config/uci.sh ] && . /lib/config/uci.sh
